Concussion is a violent injury to an organ, esp to brain & followed by temporary or prolonged loss of function. It is not usually a life threatening injury, but it can cause short term & long term problems.
Loud noises, such as that made by thunder or by something breaking violently into pieces, can frighten a person. Avoid both.

there is no relationship between them.concussion is limited period of unconsciousness caused by injury to head and may last for few seconds of hours.there is no recognisable structural damage to the brain though repeated concussion eventually causes brain damage.